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Numbers

Numbers
1024-cylinder limit

The x86 BIOS has traditionally been unable to read past the 1024th cylinder in a cylinder/head/sector (CHS) addressing scheme, which has limited the size of hard disks—first to 504MB (or about 528 million bytes, so some people refer to it as the 528MB limit) and then to just under 8GB. On a computer with an old BIOS, the 1024-cylinder limit prevents the system from booting a kernel from higher than this limit, although Linux itself uses addressing schemes that aren't bothered by this limit. BIOSs made since the late 1990s also include ways around the limit, if the software understands those mechanisms. See also cylinder/head/sector (CHS) addressing.



3DES

See Triple Data Encryption Standard (3DES).




  

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